John III Comyn, Lord of Badenoch or John "the Red", also known simply as the Red Comyn (died 10 February 1306) was a Scottish nobleman who was an important figure in the Wars of Scottish Independence, and was Guardian of Scotland for a time. He is best known for having been stabbed to death by King Robert I of Scotland in Dumfries. His father, John II Comyn, Lord of Badenoch, known as the Black Comyn, was one of the Competitors for the Crown of Scotland, claiming his descent from King Donald III of Scotland. His mother was Eleanor Balliol, eldest daughter of John I de Balliol. The Red Comyn might thus be said to have combined two lines of royal descent, Celtic and Norman. He had, moreover, links with the royal house of England: in the early 1290s he married Joan de Valence, daughter of William de Valence, 1st Earl of Pembroke, an uncle of Edward I.